import urllib.request

req = urllib.request.Request('http://placekitten.com/g/600/600')
response = urllib.request.urlopen(req)

cat_img = response.read()
with open('cat_600_600.jpg','wb') as f:
    f.write(cat_img)


'''
import urllib.request

response = urllib.request.urlopen('http://placekitten.com/g/500/600')

cat_img = response.read()
with open('cat_500_600.jpg','wb') as f:
    f.write(cat_img)
'''



